Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid

Pull HID update from Jiri Kosina:

- Wacom driver fixes/updates (device name generation improvements,
touch ring status support) from Jason Gerecke

- T100 touchpad support from Hans de Goede

- support for batteries driven by HID input reports, from Dmitry
Torokhov

- Arnd pointed out that driver_lock semaphore is superfluous, as driver
core already provides all the necessary concurency protection.
Removal patch from Binoy Jayan

- logical minimum numbering improvements in sensor-hub driver, from
Srinivas Pandruvada

- support for Microsoft Win8 Wireless Radio Controls extensions from
João Paulo Rechi Vita

- assorted small fixes and device ID additions

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (28 commits)
HID: prodikeys: constify snd_rawmidi_ops structures
HID: sensor: constify platform_device_id
HID: input: throttle battery uevents
HID: usbmouse: constify usb_device_id and fix space before '[' error
HID: usbkbd: constify usb_device_id and fix space before '[' error.
HID: hid-sensor-hub: Force logical minimum to 1 for power and report state
HID: wacom: Do not completely map WACOM_HID_WD_TOUCHRINGSTATUS usage
HID: asus: Add T100CHI bluetooth keyboard dock touchpad support
HID: ntrig: constify attribute_group structures.
HID: logitech-hidpp: constify attribute_group structures.
HID: sensor: constify attribute_group structures.
HID: multitouch: constify attribute_group structures.
HID: multitouch: use proper symbolic constant for 0xff310076 application
HID: multitouch: Support Asus T304UA media keys
HID: multitouch: Support HID_GD_WIRELESS_RADIO_CTLS
HID: input: optionally use device id in battery name
HID: input: map digitizer battery usage
HID: Remove the semaphore driver_lock
HID: wacom: add USB_HID dependency
HID: add ALWAYS_POLL quirk for Logitech 0xc077
...

drivers/hid/Kconfig

···
 
 config HID_WACOM
 	tristate "Wacom Intuos/Graphire tablet support (USB)"
-	depends on HID
+	depends on USB_HID
 	select POWER_SUPPLY
 	select NEW_LEDS
 	select LEDS_CLASS

drivers/hid/hid-asus.c

···
 #include <linux/hid.h>
 #include <linux/module.h>
 #include <linux/input/mt.h>
+#include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
 
 #include "hid-ids.h"
 
···
 MODULE_AUTHOR("Frederik Wenigwieser <[e-mail]>");
 MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
 
+#define T100_TPAD_INTF 2
+
+#define T100CHI_MOUSE_REPORT_ID 0x06
 #define FEATURE_REPORT_ID 0x0d
 #define INPUT_REPORT_ID 0x5d
 #define FEATURE_KBD_REPORT_ID 0x5a
-
-#define INPUT_REPORT_SIZE 28
 #define FEATURE_KBD_REPORT_SIZE 16
 
 #define SUPPORT_KBD_BACKLIGHT BIT(0)
 
-#define MAX_CONTACTS 5
-
-#define MAX_X 2794
-#define MAX_Y 1758
 #define MAX_TOUCH_MAJOR 8
 #define MAX_PRESSURE 128
-
-#define CONTACT_DATA_SIZE 5
 
 #define BTN_LEFT_MASK 0x01
 #define CONTACT_TOOL_TYPE_MASK 0x80
···
 #define QUIRK_NO_CONSUMER_USAGES	BIT(4)
 #define QUIRK_USE_KBD_BACKLIGHT		BIT(5)
 #define QUIRK_T100_KEYBOARD		BIT(6)
+#define QUIRK_T100CHI			BIT(7)
 
 #define I2C_KEYBOARD_QUIRKS			(QUIRK_FIX_NOTEBOOK_REPORT | \
 						 QUIRK_NO_INIT_REPORTS | \
···
 	bool removed;
 };
 
+struct asus_touchpad_info {
+	int max_x;
+	int max_y;
+	int res_x;
+	int res_y;
+	int contact_size;
+	int max_contacts;
+};
+
 struct asus_drvdata {
 	unsigned long quirks;
 	struct input_dev *input;
 	struct asus_kbd_leds *kbd_backlight;
+	const struct asus_touchpad_info *tp;
 	bool enable_backlight;
 };
 
-static void asus_report_contact_down(struct input_dev *input,
+static const struct asus_touchpad_info asus_i2c_tp = {
+	.max_x = 2794,
+	.max_y = 1758,
+	.contact_size = 5,
+	.max_contacts = 5,
+};
+
+static const struct asus_touchpad_info asus_t100ta_tp = {
+	.max_x = 2240,
+	.max_y = 1120,
+	.res_x = 30, /* units/mm */
+	.res_y = 27, /* units/mm */
+	.contact_size = 5,
+	.max_contacts = 5,
+};
+
+static const struct asus_touchpad_info asus_t100chi_tp = {
+	.max_x = 2640,
+	.max_y = 1320,
+	.res_x = 31, /* units/mm */
+	.res_y = 29, /* units/mm */
+	.contact_size = 3,
+	.max_contacts = 4,
+};
+
+static void asus_report_contact_down(struct asus_drvdata *drvdat,
 		int toolType, u8 *data)
 {
-	int touch_major, pressure;
-	int x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
-	int y = MAX_Y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
+	struct input_dev *input = drvdat->input;
+	int touch_major, pressure, x, y;
+
+	x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
+	y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
+
+	input_report_abs(input, ABS_MT_POSITION_X, x);
+	input_report_abs(input, ABS_MT_POSITION_Y, y);
+
+	if (drvdat->tp->contact_size < 5)
+		return;
 
 	if (toolType == MT_TOOL_PALM) {
 		touch_major = MAX_TOUCH_MAJOR;
···
 		pressure = data[4] & CONTACT_PRESSURE_MASK;
 	}
 
-	input_report_abs(input, ABS_MT_POSITION_X, x);
-	input_report_abs(input, ABS_MT_POSITION_Y, y);
 	input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
 	input_report_abs(input, ABS_MT_PRESSURE, pressure);
 }
 
 /* Required for Synaptics Palm Detection */
-static void asus_report_tool_width(struct input_dev *input)
+static void asus_report_tool_width(struct asus_drvdata *drvdat)
 {
-	struct input_mt *mt = input->mt;
+	struct input_mt *mt = drvdat->input->mt;
 	struct input_mt_slot *oldest;
 	int oldid, count, i;
+
+	if (drvdat->tp->contact_size < 5)
+		return;
 
 	oldest = NULL;
 	oldid = mt->trkid;
···
 	}
 
 	if (oldest) {
-		input_report_abs(input, ABS_TOOL_WIDTH,
+		input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
 			input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
 	}
 }
 
-static void asus_report_input(struct input_dev *input, u8 *data)
+static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
 {
-	int i;
+	int i, toolType = MT_TOOL_FINGER;
 	u8 *contactData = data + 2;
 
-	for (i = 0; i < MAX_CONTACTS; i++) {
+	if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
+		return 0;
+
+	for (i = 0; i < drvdat->tp->max_contacts; i++) {
 		bool down = !!(data[1] & BIT(i+3));
-		int toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
+
+		if (drvdat->tp->contact_size >= 5)
+			toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
 						MT_TOOL_PALM : MT_TOOL_FINGER;
 
-		input_mt_slot(input, i);
-		input_mt_report_slot_state(input, toolType, down);
+		input_mt_slot(drvdat->input, i);
+		input_mt_report_slot_state(drvdat->input, toolType, down);
 
 		if (down) {
-			asus_report_contact_down(input, toolType, contactData);
-			contactData += CONTACT_DATA_SIZE;
+			asus_report_contact_down(drvdat, toolType, contactData);
+			contactData += drvdat->tp->contact_size;
 		}
 	}
 
-	input_report_key(input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
-	asus_report_tool_width(input);
+	input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
+	asus_report_tool_width(drvdat);
 
-	input_mt_sync_frame(input);
-	input_sync(input);
+	input_mt_sync_frame(drvdat->input);
+	input_sync(drvdat->input);
+
+	return 1;
 }
 
 static int asus_raw_event(struct hid_device *hdev,
···
 {
 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 
-	if (drvdata->quirks & QUIRK_IS_MULTITOUCH &&
-					 data[0] == INPUT_REPORT_ID &&
-						size == INPUT_REPORT_SIZE) {
-		asus_report_input(drvdata->input, data);
-		return 1;
-	}
+	if (drvdata->tp && data[0] == INPUT_REPORT_ID)
+		return asus_report_input(drvdata, data, size);
 
 	return 0;
 }
···
 	struct input_dev *input = hi->input;
 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 
-	if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
+	/* T100CHI uses MULTI_INPUT, bind the touchpad to the mouse hid_input */
+	if (drvdata->quirks & QUIRK_T100CHI &&
+	    hi->report->id != T100CHI_MOUSE_REPORT_ID)
+		return 0;
+
+	if (drvdata->tp) {
 		int ret;
 
-		input_set_abs_params(input, ABS_MT_POSITION_X, 0, MAX_X, 0, 0);
-		input_set_abs_params(input, ABS_MT_POSITION_Y, 0, MAX_Y, 0, 0);
-		input_set_abs_params(input, ABS_TOOL_WIDTH, 0, MAX_TOUCH_MAJOR, 0, 0);
-		input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, MAX_TOUCH_MAJOR, 0, 0);
-		input_set_abs_params(input, ABS_MT_PRESSURE, 0, MAX_PRESSURE, 0, 0);
+		input_set_abs_params(input, ABS_MT_POSITION_X, 0,
+				     drvdata->tp->max_x, 0, 0);
+		input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
+				     drvdata->tp->max_y, 0, 0);
+		input_abs_set_res(input, ABS_MT_POSITION_X, drvdata->tp->res_x);
+		input_abs_set_res(input, ABS_MT_POSITION_Y, drvdata->tp->res_y);
+
+		if (drvdata->tp->contact_size >= 5) {
+			input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
+					     MAX_TOUCH_MAJOR, 0, 0);
+			input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
+					     MAX_TOUCH_MAJOR, 0, 0);
+			input_set_abs_params(input, ABS_MT_PRESSURE, 0,
+					      MAX_PRESSURE, 0, 0);
+		}
 
 		__set_bit(BTN_LEFT, input->keybit);
 		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 
-		ret = input_mt_init_slots(input, MAX_CONTACTS, INPUT_MT_POINTER);
+		ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
+					  INPUT_MT_POINTER);
 
 		if (ret) {
 			hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
···
 		 * We do it all manually in asus_input_configured
 		 */
 		return -1;
+	}
+
+	/*
+	 * Ignore a bunch of bogus collections in the T100CHI descriptor.
+	 * This avoids a bunch of non-functional hid_input devices getting
+	 * created because of the T100CHI using HID_QUIRK_MULTI_INPUT.
+	 */
+	if (drvdata->quirks & QUIRK_T100CHI) {
+		if (field->application == (HID_UP_GENDESK | 0x0080) ||
+		    usage->hid == (HID_UP_GENDEVCTRLS | 0x0024) ||
+		    usage->hid == (HID_UP_GENDEVCTRLS | 0x0025) ||
+		    usage->hid == (HID_UP_GENDEVCTRLS | 0x0026))
+			return -1;
+		/*
+		 * We use the hid_input for the mouse report for the touchpad,
+		 * keep the left button, to avoid the core removing it.
+		 */
+		if (field->application == HID_GD_MOUSE &&
+		    usage->hid != (HID_UP_BUTTON | 1))
+			return -1;
 	}
 
 	/* ASUS-specific keyboard hotkeys */
···
 {
 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 
-	if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
+	if (drvdata->tp)
 		return asus_start_multitouch(hdev);
 
 	return 0;
···
 	hid_set_drvdata(hdev, drvdata);
 
 	drvdata->quirks = id->driver_data;
+
+	if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
+		drvdata->tp = &asus_i2c_tp;
+
+	if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
+		struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+
+		if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
+			drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
+			drvdata->tp = &asus_t100ta_tp;
+		}
+	}
+
+	if (drvdata->quirks & QUIRK_T100CHI) {
+		/*
+		 * All functionality is on a single HID interface and for
+		 * userspace the touchpad must be a separate input_dev.
+		 */
+		hdev->quirks |= HID_QUIRK_MULTI_INPUT |
+				HID_QUIRK_NO_EMPTY_INPUT;
+		drvdata->tp = &asus_t100chi_tp;
+	}
 
 	if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
 		hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
···
 		goto err_stop_hw;
 	}
 
-	if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
+	if (drvdata->tp) {
 		drvdata->input->name = "Asus TouchPad";
 	} else {
 		drvdata->input->name = "Asus Keyboard";
 	}
 
-	if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
+	if (drvdata->tp) {
 		ret = asus_start_multitouch(hdev);
 		if (ret)
 			goto err_stop_hw;
···
 		hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
 		rdesc[55] = 0xdd;
 	}
+	/* For the T100TA keyboard dock */
 	if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
 		 *rsize == 76 && rdesc[73] == 0x81 && rdesc[74] == 0x01) {
 		hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
 		rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
+	}
+	/* For the T100CHI keyboard dock */
+	if (drvdata->quirks & QUIRK_T100CHI &&
+		 *rsize == 403 && rdesc[388] == 0x09 && rdesc[389] == 0x76) {
+		/*
+		 * Change Usage (76h) to Usage Minimum (00h), Usage Maximum
+		 * (FFh) and clear the flags in the Input() byte.
+		 * Note the descriptor has a bogus 0 byte at the end so we
+		 * only need 1 extra byte.
+		 */
+		*rsize = 404;
+		rdesc = kmemdup(rdesc, *rsize, GFP_KERNEL);
+		if (!rdesc)
+			return NULL;
+
+		hid_info(hdev, "Fixing up T100CHI keyb report descriptor\n");
+		memmove(rdesc + 392, rdesc + 390, 12);
+		rdesc[388] = 0x19;
+		rdesc[389] = 0x00;
+		rdesc[390] = 0x29;
+		rdesc[391] = 0xff;
+		rdesc[402] = 0x00;
 	}
 
 	return rdesc;
···
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
+		USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), QUIRK_T100CHI },
+
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, asus_devices);

drivers/hid/hid-core.c

···
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD) },
 #endif
 #if IS_ENABLED(CONFIG_HID_AUREAL)
 	{ HID_USB_DEVICE(USB_VENDOR_ID_AUREAL, USB_DEVICE_ID_AUREAL_W01RN) },
···
 	const struct hid_device_id *id;
 	int ret = 0;
 
-	if (down_interruptible(&hdev->driver_lock))
-		return -EINTR;
 	if (down_interruptible(&hdev->driver_input_lock)) {
 		ret = -EINTR;
-		goto unlock_driver_lock;
+		goto end;
 	}
 	hdev->io_started = false;
 
···
 unlock:
 	if (!hdev->io_started)
 		up(&hdev->driver_input_lock);
-unlock_driver_lock:
-	up(&hdev->driver_lock);
+end:
 	return ret;
 }
 
···
 	struct hid_driver *hdrv;
 	int ret = 0;
 
-	if (down_interruptible(&hdev->driver_lock))
-		return -EINTR;
 	if (down_interruptible(&hdev->driver_input_lock)) {
 		ret = -EINTR;
-		goto unlock_driver_lock;
+		goto end;
 	}
 	hdev->io_started = false;
 
···
 
 	if (!hdev->io_started)
 		up(&hdev->driver_input_lock);
-unlock_driver_lock:
-	up(&hdev->driver_lock);
+end:
 	return ret;
 }
 
···
 	init_waitqueue_head(&hdev->debug_wait);
 	INIT_LIST_HEAD(&hdev->debug_list);
 	spin_lock_init(&hdev->debug_list_lock);
-	sema_init(&hdev->driver_lock, 1);
 	sema_init(&hdev->driver_input_lock, 1);
 	mutex_init(&hdev->ll_open_lock);
 

drivers/hid/hid-ids.h

···
 #define USB_DEVICE_ID_ASUSTEK_LCM	0x1726
 #define USB_DEVICE_ID_ASUSTEK_LCM2	0x175b
 #define USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD	0x17e0
+#define USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD	0x8502
+#define USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD	0x184a
 #define USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD	0x8585
 #define USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD	0x0101
 #define USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1 0x1854
···
 #define USB_VENDOR_ID_LOGITECH		0x046d
 #define USB_DEVICE_ID_LOGITECH_AUDIOHUB 0x0a0e
 #define USB_DEVICE_ID_LOGITECH_T651	0xb00c
-#define USB_DEVICE_ID_LOGITECH_C077	0xc007
+#define USB_DEVICE_ID_LOGITECH_C007	0xc007
+#define USB_DEVICE_ID_LOGITECH_C077	0xc077
 #define USB_DEVICE_ID_LOGITECH_RECEIVER	0xc101
 #define USB_DEVICE_ID_LOGITECH_HARMONY_FIRST  0xc110
 #define USB_DEVICE_ID_LOGITECH_HARMONY_LAST 0xc14f

drivers/hid/hid-input.c

···
 	return quirks;
 }
 
+static int hidinput_scale_battery_capacity(struct hid_device *dev,
+					   int value)
+{
+	if (dev->battery_min < dev->battery_max &&
+	    value >= dev->battery_min && value <= dev->battery_max)
+		value = ((value - dev->battery_min) * 100) /
+			(dev->battery_max - dev->battery_min);
+
+	return value;
+}
+
+static int hidinput_query_battery_capacity(struct hid_device *dev)
+{
+	u8 *buf;
+	int ret;
+
+	buf = kmalloc(2, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
+				 dev->battery_report_type, HID_REQ_GET_REPORT);
+	if (ret != 2) {
+		kfree(buf);
+		return -ENODATA;
+	}
+
+	ret = hidinput_scale_battery_capacity(dev, buf[1]);
+	kfree(buf);
+	return ret;
+}
+
 static int hidinput_get_battery_property(struct power_supply *psy,
 					 enum power_supply_property prop,
 					 union power_supply_propval *val)
 {
 	struct hid_device *dev = power_supply_get_drvdata(psy);
+	int value;
 	int ret = 0;
-	__u8 *buf;
 
 	switch (prop) {
 	case POWER_SUPPLY_PROP_PRESENT:
···
 		break;
 
 	case POWER_SUPPLY_PROP_CAPACITY:
-
-		buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
-		if (!buf) {
-			ret = -ENOMEM;
-			break;
+		if (dev->battery_report_type == HID_FEATURE_REPORT) {
+			value = hidinput_query_battery_capacity(dev);
+			if (value < 0)
+				return value;
+		} else  {
+			value = dev->battery_capacity;
 		}
-		ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
-					 dev->battery_report_type,
-					 HID_REQ_GET_REPORT);
 
-		if (ret != 2) {
-			ret = -ENODATA;
-			kfree(buf);
-			break;
-		}
-		ret = 0;
-
-		if (dev->battery_min < dev->battery_max &&
-		    buf[1] >= dev->battery_min &&
-		    buf[1] <= dev->battery_max)
-			val->intval = (100 * (buf[1] - dev->battery_min)) /
-				(dev->battery_max - dev->battery_min);
-		kfree(buf);
+		val->intval = value;
 		break;
 
 	case POWER_SUPPLY_PROP_MODEL_NAME:
···
 		break;
 
 	case POWER_SUPPLY_PROP_STATUS:
-		val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		if (!dev->battery_reported &&
+		    dev->battery_report_type == HID_FEATURE_REPORT) {
+			value = hidinput_query_battery_capacity(dev);
+			if (value < 0)
+				return value;
+
+			dev->battery_capacity = value;
+			dev->battery_reported = true;
+		}
+
+		if (!dev->battery_reported)
+			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+		else if (dev->battery_capacity == 100)
+			val->intval = POWER_SUPPLY_STATUS_FULL;
+		else
+			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 		break;
 
 	case POWER_SUPPLY_PROP_SCOPE:
···
 	return ret;
 }
 
-static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
+static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 {
-	struct power_supply_desc *psy_desc = NULL;
+	struct power_supply_desc *psy_desc;
 	struct power_supply_config psy_cfg = { .drv_data = dev, };
 	unsigned quirks;
 	s32 min, max;
+	int error;
 
-	if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
-		return false;	/* no match */
-
-	if (dev->battery != NULL)
-		goto out;	/* already initialized? */
+	if (dev->battery)
+		return 0;	/* already initialized? */
 
 	quirks = find_battery_quirk(dev);
 
···
 		dev->bus, dev->vendor, dev->product, dev->version, quirks);
 
 	if (quirks & HID_BATTERY_QUIRK_IGNORE)
-		goto out;
+		return 0;
 
 	psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
-	if (psy_desc == NULL)
-		goto out;
+	if (!psy_desc)
+		return -ENOMEM;
 
-	psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
-	if (psy_desc->name == NULL) {
-		kfree(psy_desc);
-		goto out;
+	psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
+				   strlen(dev->uniq) ?
+					dev->uniq : dev_name(&dev->dev));
+	if (!psy_desc->name) {
+		error = -ENOMEM;
+		goto err_free_mem;
 	}
 
 	psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
···
 
 	dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 	if (IS_ERR(dev->battery)) {
-		hid_warn(dev, "can't register power supply: %ld\n",
-				PTR_ERR(dev->battery));
-		kfree(psy_desc->name);
-		kfree(psy_desc);
-		dev->battery = NULL;
-	} else {
-		power_supply_powers(dev->battery, &dev->dev);
+		error = PTR_ERR(dev->battery);
+		hid_warn(dev, "can't register power supply: %d\n", error);
+		goto err_free_name;
 	}
 
-out:
-	return true;
+	power_supply_powers(dev->battery, &dev->dev);
+	return 0;
+
+err_free_name:
+	kfree(psy_desc->name);
+err_free_mem:
+	kfree(psy_desc);
+	dev->battery = NULL;
+	return error;
 }
 
 static void hidinput_cleanup_battery(struct hid_device *dev)
···
 	kfree(psy_desc);
 	dev->battery = NULL;
 }
-#else  /* !CONFIG_HID_BATTERY_STRENGTH */
-static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
-				   struct hid_field *field)
+
+static void hidinput_update_battery(struct hid_device *dev, int value)
 {
-	return false;
+	int capacity;
+
+	if (!dev->battery)
+		return;
+
+	if (value == 0 || value < dev->battery_min || value > dev->battery_max)
+		return;
+
+	capacity = hidinput_scale_battery_capacity(dev, value);
+
+	if (!dev->battery_reported || capacity != dev->battery_capacity) {
+		dev->battery_capacity = capacity;
+		dev->battery_reported = true;
+		power_supply_changed(dev->battery);
+	}
+}
+#else  /* !CONFIG_HID_BATTERY_STRENGTH */
+static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
+				  struct hid_field *field)
+{
+	return 0;
 }
 
 static void hidinput_cleanup_battery(struct hid_device *dev)
+{
+}
+
+static void hidinput_update_battery(struct hid_device *dev, int value)
 {
 }
 #endif	/* CONFIG_HID_BATTERY_STRENGTH */
···
 			default: map_key(BTN_TOOL_PEN); break;
 			}
 			break;
+
+		case 0x3b: /* Battery Strength */
+			hidinput_setup_battery(device, HID_INPUT_REPORT, field);
+			usage->type = EV_PWR;
+			goto ignore;
 
 		case 0x3c: /* Invert */
 			map_key_clear(BTN_TOOL_RUBBER);
···
 		break;
 
 	case HID_UP_GENDEVCTRLS:
-		if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
+		switch (usage->hid) {
+		case HID_DC_BATTERYSTRENGTH:
+			hidinput_setup_battery(device, HID_INPUT_REPORT, field);
+			usage->type = EV_PWR;
 			goto ignore;
-		else
-			goto unknown;
-		break;
+		}
+		goto unknown;
 
 	case HID_UP_HPVENDOR:	/* Reported on a Dutch layout HP5308 */
 		set_bit(EV_REP, input->evbit);
···
 	if (usage->code > max)
 		goto ignore;
 
-
 	if (usage->type == EV_ABS) {
 
 		int a = field->logical_minimum;
···
 	struct input_dev *input;
 	unsigned *quirks = &hid->quirks;
 
+	if (!usage->type)
+		return;
+
+	if (usage->type == EV_PWR) {
+		hidinput_update_battery(hid, value);
+		return;
+	}
+
 	if (!field->hidinput)
 		return;
 
 	input = field->hidinput->input;
-
-	if (!usage->type)
-		return;
 
 	if (usage->hat_min < usage->hat_max || usage->hat_dir) {
 		int hat_dir = usage->hat_dir;
···
 	struct hid_driver *drv = hid->driver;
 	struct hid_report_enum *rep_enum;
 	struct hid_report *rep;
+	struct hid_usage *usage;
 	int i, j;
 
 	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
···
 				continue;
 
 			for (j = 0; j < rep->field[i]->maxusage; j++) {
+				usage = &rep->field[i]->usage[j];
+
 				/* Verify if Battery Strength feature is available */
-				hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
+				if (usage->hid == HID_DC_BATTERYSTRENGTH)
+					hidinput_setup_battery(hid, HID_FEATURE_REPORT,
+							       rep->field[i]);
 
 				if (drv->feature_mapping)
-					drv->feature_mapping(hid, rep->field[i],
-							     rep->field[i]->usage + j);
+					drv->feature_mapping(hid, rep->field[i], usage);
 			}
 		}
 }

drivers/hid/hid-logitech-hidpp.c

···
 	NULL
 };
 
-static struct attribute_group ps_attribute_group = {
+static const struct attribute_group ps_attribute_group = {
 	.attrs = sysfs_attrs
 };
 

drivers/hid/hid-multitouch.c

···
 #define MT_QUIRK_FIX_CONST_CONTACT_ID	BIT(14)
 #define MT_QUIRK_TOUCH_SIZE_SCALING	BIT(15)
 #define MT_QUIRK_STICKY_FINGERS		BIT(16)
+#define MT_QUIRK_ASUS_CUSTOM_UP		BIT(17)
 
 #define MT_INPUTMODE_TOUCHSCREEN	0x02
 #define MT_INPUTMODE_TOUCHPAD		0x03
···
 #define MT_CLS_GENERALTOUCH_TWOFINGERS		0x0108
 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS	0x0109
 #define MT_CLS_LG				0x010a
+#define MT_CLS_ASUS				0x010b
 #define MT_CLS_VTL				0x0110
 #define MT_CLS_GOOGLE				0x0111
 
···
 			MT_QUIRK_IGNORE_DUPLICATES |
 			MT_QUIRK_HOVERING |
 			MT_QUIRK_CONTACT_CNT_ACCURATE },
+	{ .name = MT_CLS_ASUS,
+		.quirks = MT_QUIRK_ALWAYS_VALID |
+			MT_QUIRK_CONTACT_CNT_ACCURATE |
+			MT_QUIRK_ASUS_CUSTOM_UP },
 	{ .name = MT_CLS_VTL,
 		.quirks = MT_QUIRK_ALWAYS_VALID |
 			MT_QUIRK_CONTACT_CNT_ACCURATE |
···
 	NULL
 };
 
-static struct attribute_group mt_attribute_group = {
+static const struct attribute_group mt_attribute_group = {
 	.attrs = sysfs_attrs
 };
 
···
 	return 0;
 }
 
+#define mt_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, \
+						    max, EV_KEY, (c))
 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 		struct hid_field *field, struct hid_usage *usage,
 		unsigned long **bit, int *max)
···
 	    field->application != HID_DG_PEN &&
 	    field->application != HID_DG_TOUCHPAD &&
 	    field->application != HID_GD_KEYBOARD &&
-	    field->application != HID_CP_CONSUMER_CONTROL)
+	    field->application != HID_CP_CONSUMER_CONTROL &&
+	    field->application != HID_GD_WIRELESS_RADIO_CTLS &&
+	    !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
+	      td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP))
 		return -1;
+
+	/*
+	 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
+	 * touchpad report descriptor. We need to treat these as an array to
+	 * map usages to input keys.
+	 */
+	if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
+	    td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
+	    (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
+		set_bit(EV_REP, hi->input->evbit);
+		if (field->flags & HID_MAIN_ITEM_VARIABLE)
+			field->flags &= ~HID_MAIN_ITEM_VARIABLE;
+		switch (usage->hid & HID_USAGE) {
+		case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN);	break;
+		case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP);		break;
+		case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF);		break;
+		case 0x6b: mt_map_key_clear(KEY_F21);			break;
+		case 0x6c: mt_map_key_clear(KEY_SLEEP);			break;
+		default:
+			return -1;
+		}
+		return 1;
+	}
 
 	/*
 	 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
···
 			break;
 		case HID_CP_CONSUMER_CONTROL:
 			suffix = "Consumer Control";
+			break;
+		case HID_GD_WIRELESS_RADIO_CTLS:
+			suffix = "Wireless Radio Control";
+			break;
+		case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
+			suffix = "Custom Media Keys";
 			break;
 		default:
 			suffix = "UNKNOWN";
···
 	{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
 		MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
 			USB_DEVICE_ID_ANTON_TOUCH_PAD) },
+
+	/* Asus T304UA */
+	{ .driver_data = MT_CLS_ASUS,
+		HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_ASUSTEK,
+			USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
 
 	/* Atmel panels */
 	{ .driver_data = MT_CLS_SERIAL,

drivers/hid/hid-ntrig.c

···
 	NULL
 };
 
-static struct attribute_group ntrig_attribute_group = {
+static const struct attribute_group ntrig_attribute_group = {
 	.attrs = sysfs_attrs
 };
 

drivers/hid/hid-prodikeys.c

···
 	pm->in_triggered = up;
 }
 
-static struct snd_rawmidi_ops pcmidi_in_ops = {
+static const struct snd_rawmidi_ops pcmidi_in_ops = {
 	.open = pcmidi_in_open,
 	.close = pcmidi_in_close,
 	.trigger = pcmidi_in_trigger

drivers/hid/hid-sensor-custom.c

···
 	NULL,
 };
 
-static struct attribute_group enable_sensor_attr_group = {
+static const struct attribute_group enable_sensor_attr_group = {
 	.attrs = enable_sensor_attrs,
 };
 
···
 	return 0;
 }
 
-static struct platform_device_id hid_sensor_custom_ids[] = {
+static const struct platform_device_id hid_sensor_custom_ids[] = {
 	{
 		.name = "HID-SENSOR-2000e1",
 	},

drivers/hid/hid-sensor-hub.c

···
 }
 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 
-static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
-		unsigned int *rsize)
-{
-	int index;
-	struct sensor_hub_data *sd =  hid_get_drvdata(hdev);
-	unsigned char report_block[] = {
-				0x0a,  0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
-	unsigned char power_block[] = {
-				0x0a,  0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
-
-	if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
-		hid_dbg(hdev, "No Enum quirks\n");
-		return rdesc;
-	}
-
-	/* Looks for power and report state usage id and force to 1 */
-	for (index = 0; index < *rsize; ++index) {
-		if (((*rsize - index) > sizeof(report_block)) &&
-			!memcmp(&rdesc[index], report_block,
-						sizeof(report_block))) {
-			rdesc[index + 4] = 0x01;
-			index += sizeof(report_block);
-		}
-		if (((*rsize - index) > sizeof(power_block)) &&
-			!memcmp(&rdesc[index], power_block,
-						sizeof(power_block))) {
-			rdesc[index + 4] = 0x01;
-			index += sizeof(power_block);
-		}
-	}
-
-	/* Checks if the report descriptor of Thinkpad Helix 2 has a logical
-	 * minimum for magnetic flux axis greater than the maximum */
-	if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA &&
-		*rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 &&
-		rdesc[915] == 0x81 && rdesc[916] == 0x08 &&
-		rdesc[917] == 0x00 && rdesc[918] == 0x27 &&
-		rdesc[921] == 0x07 && rdesc[922] == 0x00) {
-		/* Sets negative logical minimum for mag x, y and z */
-		rdesc[914] = rdesc[935] = rdesc[956] = 0xc0;
-		rdesc[915] = rdesc[936] = rdesc[957] = 0x7e;
-		rdesc[916] = rdesc[937] = rdesc[958] = 0xf7;
-		rdesc[917] = rdesc[938] = rdesc[959] = 0xff;
-	}
-
-	return rdesc;
-}
-
 static int sensor_hub_probe(struct hid_device *hdev,
 				const struct hid_device_id *id)
 {
···
 }
 
 static const struct hid_device_id sensor_hub_devices[] = {
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
-			USB_DEVICE_ID_INTEL_HID_SENSOR_0),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
-			USB_DEVICE_ID_INTEL_HID_SENSOR_0),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
-			USB_DEVICE_ID_INTEL_HID_SENSOR_1),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
-			USB_DEVICE_ID_MS_SURFACE_PRO_2),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
-			USB_DEVICE_ID_MS_TOUCH_COVER_2),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
-			USB_DEVICE_ID_MS_TYPE_COVER_2),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
-			0x07bd), /* Microsoft Surface 3 */
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROCHIP,
-			0x0f01), /* MM7150 */
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
-			USB_DEVICE_ID_STM_HID_SENSOR),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
-			USB_DEVICE_ID_STM_HID_SENSOR_1),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS,
-			USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE,
-			USB_DEVICE_ID_ITE_LENOVO_YOGA),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE,
-			USB_DEVICE_ID_ITE_LENOVO_YOGA2),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE,
-			USB_DEVICE_ID_ITE_LENOVO_YOGA900),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
-	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
-			0x22D8),
-			.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 		     HID_ANY_ID) },
 	{ }
···
 	.probe = sensor_hub_probe,
 	.remove = sensor_hub_remove,
 	.raw_event = sensor_hub_raw_event,
-	.report_fixup = sensor_hub_report_fixup,
 #ifdef CONFIG_PM
 	.suspend = sensor_hub_suspend,
 	.resume = sensor_hub_resume,

drivers/hid/i2c-hid/i2c-hid.c

···
 	return 0;
 }
 
-static struct hid_ll_driver i2c_hid_ll_driver = {
+struct hid_ll_driver i2c_hid_ll_driver = {
 	.parse = i2c_hid_parse,
 	.start = i2c_hid_start,
 	.stop = i2c_hid_stop,
···
 	.output_report = i2c_hid_output_report,
 	.raw_request = i2c_hid_raw_request,
 };
+EXPORT_SYMBOL_GPL(i2c_hid_ll_driver);
 
 static int i2c_hid_init_irq(struct i2c_client *client)
 {

drivers/hid/uhid.c

···
 	return uhid_hid_output_raw(hid, buf, count, HID_OUTPUT_REPORT);
 }
 
-static struct hid_ll_driver uhid_hid_driver = {
+struct hid_ll_driver uhid_hid_driver = {
 	.start = uhid_hid_start,
 	.stop = uhid_hid_stop,
 	.open = uhid_hid_open,
···
 	.raw_request = uhid_hid_raw_request,
 	.output_report = uhid_hid_output_report,
 };
+EXPORT_SYMBOL_GPL(uhid_hid_driver);
 
 #ifdef CONFIG_COMPAT
 

drivers/hid/usbhid/hid-core.c

···
 	return hid_set_idle(dev, ifnum, report, idle);
 }
 
-static struct hid_ll_driver usb_hid_driver = {
+struct hid_ll_driver usb_hid_driver = {
 	.parse = usbhid_parse,
 	.start = usbhid_start,
 	.stop = usbhid_stop,
···
 	.output_report = usbhid_output_report,
 	.idle = usbhid_idle,
 };
+EXPORT_SYMBOL_GPL(usb_hid_driver);
 
 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
 {

drivers/hid/usbhid/hid-quirks.c

···
 	{ USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0A4A, HID_QUIRK_ALWAYS_POLL },
 	{ USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0B4A, HID_QUIRK_ALWAYS_POLL },
 	{ USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL },
+	{ USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_C007, HID_QUIRK_ALWAYS_POLL },
 	{ USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_C077, HID_QUIRK_ALWAYS_POLL },
 	{ USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_KEYBOARD_G710_PLUS, HID_QUIRK_NOGET },
 	{ USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOUSE_C01A, HID_QUIRK_ALWAYS_POLL },

drivers/hid/usbhid/usbkbd.c

···
 	}
 }
 
-static struct usb_device_id usb_kbd_id_table [] = {
+static const struct usb_device_id usb_kbd_id_table[] = {
 	{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
 		USB_INTERFACE_PROTOCOL_KEYBOARD) },
 	{ }						/* Terminating entry */

drivers/hid/usbhid/usbmouse.c

···
 	}
 }
 
-static struct usb_device_id usb_mouse_id_table [] = {
+static const struct usb_device_id usb_mouse_id_table[] = {
 	{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
 		USB_INTERFACE_PROTOCOL_MOUSE) },
 	{ }	/* Terminating entry */

drivers/hid/wacom_sys.c

···
 	u8 mode;
 
 	mode = wacom->led.groups[index].select;
-	if (mode >= 0 && mode < 3)
-		return snprintf(buf, PAGE_SIZE, "%d\n", mode);
-	else
-		return snprintf(buf, PAGE_SIZE, "%d\n", -1);
+	return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
 }
 
 #define DEVICE_EKR_ATTR_GROUP(SET_ID)					\
···
 
 	/* Generic devices name unspecified */
 	if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
-		if (strstr(wacom->hdev->name, "Wacom") ||
-		    strstr(wacom->hdev->name, "wacom") ||
-		    strstr(wacom->hdev->name, "WACOM")) {
-			/* name is in HID descriptor, use it */
-			strlcpy(name, wacom->hdev->name, sizeof(name));
+		char *product_name = wacom->hdev->name;
 
-			/* strip out excess whitespaces */
-			while (1) {
-				char *gap = strstr(name, "  ");
-				if (gap == NULL)
-					break;
-				/* shift everything including the terminator */
-				memmove(gap, gap+1, strlen(gap));
-			}
-
-			/* strip off excessive prefixing */
-			if (strstr(name, "Wacom Co.,Ltd. Wacom ") == name) {
-				int n = strlen(name);
-				int x = strlen("Wacom Co.,Ltd. ");
-				memmove(name, name+x, n-x+1);
-			}
-			if (strstr(name, "Wacom Co., Ltd. Wacom ") == name) {
-				int n = strlen(name);
-				int x = strlen("Wacom Co., Ltd. ");
-				memmove(name, name+x, n-x+1);
-			}
-
-			/* get rid of trailing whitespace */
-			if (name[strlen(name)-1] == ' ')
-				name[strlen(name)-1] = '\0';
-		} else {
-			/* no meaningful name retrieved. use product ID */
-			snprintf(name, sizeof(name),
-				 "%s %X", features->name, wacom->hdev->product);
+		if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
+			struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
+			struct usb_device *dev = interface_to_usbdev(intf);
+			product_name = dev->product;
 		}
+
+		if (wacom->hdev->bus == BUS_I2C) {
+			snprintf(name, sizeof(name), "%s %X",
+				 features->name, wacom->hdev->product);
+		} else if (strstr(product_name, "Wacom") ||
+			   strstr(product_name, "wacom") ||
+			   strstr(product_name, "WACOM")) {
+			strlcpy(name, product_name, sizeof(name));
+		} else {
+			snprintf(name, sizeof(name), "Wacom %s", product_name);
+		}
+
+		/* strip out excess whitespaces */
+		while (1) {
+			char *gap = strstr(name, "  ");
+			if (gap == NULL)
+				break;
+			/* shift everything including the terminator */
+			memmove(gap, gap+1, strlen(gap));
+		}
+
+		/* get rid of trailing whitespace */
+		if (name[strlen(name)-1] == ' ')
+			name[strlen(name)-1] = '\0';
 	} else {
 		strlcpy(name, features->name, sizeof(name));
 	}

drivers/hid/wacom_wac.c

···
 		features->device_type |= WACOM_DEVICETYPE_PAD;
 		break;
 	case WACOM_HID_WD_TOUCHRINGSTATUS:
-		wacom_map_usage(input, usage, field, EV_ABS, ABS_WHEEL, 0);
+		/*
+		 * Only set up type/code association. Completely mapping
+		 * this usage may overwrite the axis resolution and range.
+		 */
+		usage->type = EV_ABS;
+		usage->code = ABS_WHEEL;
+		set_bit(EV_ABS, input->evbit);
 		features->device_type |= WACOM_DEVICETYPE_PAD;
 		break;
 	case WACOM_HID_WD_BUTTONCONFIG:

drivers/iio/common/hid-sensors/hid-sensor-attributes.c

···
 					HID_USAGE_SENSOR_PROY_POWER_STATE,
 					&st->power_state);
 
+	st->power_state.logical_minimum = 1;
+	st->report_state.logical_minimum = 1;
+
 	sensor_hub_input_get_attribute_info(hsdev,
 			HID_FEATURE_REPORT, usage_id,
 			HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS,

include/linux/hid.h

···
 #define HID_UP_LOGIVENDOR3   0xff430000
 #define HID_UP_LNVENDOR		0xffa00000
 #define HID_UP_SENSOR		0x00200000
+#define HID_UP_ASUSVENDOR	0xff310000
 
 #define HID_USAGE		0x0000ffff
 
···
 #define HID_DG_BARRELSWITCH2	0x000d005a
 #define HID_DG_TOOLSERIALNUMBER	0x000d005b
 
+#define HID_VD_ASUS_CUSTOM_MEDIA_KEYS	0xff310076
 /*
  * HID report types --- Ouch! HID spec says 1 2 3!
  */
···
 	struct hid_report_enum report_enum[HID_REPORT_TYPES];
 	struct work_struct led_work;					/* delayed LED worker */
 
-	struct semaphore driver_lock;					/* protects the current driver, except during input */
 	struct semaphore driver_input_lock;				/* protects the current driver */
 	struct device dev;						/* device */
 	struct hid_driver *driver;
···
 	 * battery is non-NULL.
 	 */
 	struct power_supply *battery;
+	__s32 battery_capacity;
 	__s32 battery_min;
 	__s32 battery_max;
 	__s32 battery_report_type;
 	__s32 battery_report_id;
+	bool battery_reported;
 #endif
 
 	unsigned int status;						/* see STAT flags above */
 	unsigned claimed;						/* Claimed by hidinput, hiddev? */
 	unsigned quirks;						/* Various quirks the device can pull on us */
-	bool io_started;						/* Protected by driver_lock. If IO has started */
+	bool io_started;						/* If IO has started */
 
 	struct list_head inputs;					/* The list of inputs */
 	void *hiddev;							/* The hiddev structure */
···
 
 	int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
 };
+
+extern struct hid_ll_driver i2c_hid_ll_driver;
+extern struct hid_ll_driver hidp_hid_driver;
+extern struct hid_ll_driver uhid_hid_driver;
+extern struct hid_ll_driver usb_hid_driver;
+
+static inline bool hid_is_using_ll_driver(struct hid_device *hdev,
+		struct hid_ll_driver *driver)
+{
+	return hdev->ll_driver == driver;
+}
 
 #define	PM_HINT_FULLON	1<<5
 #define PM_HINT_NORMAL	1<<1

net/bluetooth/hidp/core.c

···
 	hid->claimed = 0;
 }
 
-static struct hid_ll_driver hidp_hid_driver = {
+struct hid_ll_driver hidp_hid_driver = {
 	.parse = hidp_parse,
 	.start = hidp_start,
 	.stop = hidp_stop,
···
 	.raw_request = hidp_raw_request,
 	.output_report = hidp_output_report,
 };
+EXPORT_SYMBOL_GPL(hidp_hid_driver);
 
 /* This function sets up the hid device. It does not add it
    to the HID system. That is done in hidp_add_connection(). */